Ark

choose a creature within range, and create a sphere of light around them that creature must make a constitution saving throw taking 2d10+highest mod radiant damage on a failed save, and half as much on a successful save. undeads, fiends and demons have disadvantage on this save.

Additionally if you have the extra attack feature, you can choose another target or the same target and cast Ark on them again as many times as you have extra attacks on the same casting of this spell.

At Higher Levels. When you cast this spell using a spell slot of 3th level or higher, the damage increases by 1d10 for each slot level above 2rd.